Pope Sixtus IV (21 July 1414 – 12 August 1484), born Francesco della Rovere, was Pope from 1471 to 1484. His accomplishments as Pope included the establishment of the Sistine Chapel; the group of artists that he brought together introduced the Early Renaissance into Rome with the first masterpiece of the city's new artistic age, the Vatican Archives. Sixtus also furthered the agenda of the Spanish Inquisition and annulled the decrees of the Council of Constance. He was famed for his nepotism and was personally involved in the infamous Pazzi Conspiracy.